Impkoved



A. N. IEDMAN.

File Cutting Machine.

www1, Y

Invenlor, I

Patented April 23,1867.

.iiiiiiiiiiif *Lem ninnn @eine grieten tttmtt @fitta ALEXANDER N. REDMAN, OF CHARLESTOWN, MASSACHUSETTS.

Letters Patent Ifo. 64,033, dated April 23, 1867.

IMPROVD PILE-CUTTING MACHINE.

De it known that I, ALEXANDER N. REDMAN, of Charlestown, in the county of llfliddlesex, and lState of Massachusetts, have invented certain new and usci'ul Improvements in Machines for Cutting Files, of which 'the following is a full, clear, and exact descriptioin reference being had to the accompanying drawings, making' part of this specication, in which- Figure lis a plan view of the travelling platform and tile-blank hoider,'with.the cutting apparatus and frame removed.

Figure 2 is a side elevation.

Figure 3 is a vertical section; and

Figure 4 is a inodication ol' the construction of the hammer or cutter-head.

Similar letters indicate like parts in the several figures.

The objectot` rny invention is to produce a machine which will throw out the 'cuts on the file-blank ,so as to forni the teeth in the manner heretofore best accomplished by hand-work, and also to present the leblank to the ac'tion of the cutter so that by a sinndemoveinent of the tf3fuide-frame and ile-blank holder any desired angle oi' out may readily be obtained; and the invention consists in so constructing and arranging the hammer or cutter-holder as to allow ot' an inward motion at the completion of the downward motionvin suche manner as to-throw out the surface cut; it also consists in operatinthe feed of the file-blank holderby means of' a large gear-Wheel, in combination with a small gearwheel attached to a feeding-screw which actuates the leblank holder, the large gear-wheel receivingF an intermittent tnotion from asliding-bar provided witha pawl and operated by a cam on the main shaft. The invention consists, also, in a methodof adjusting,` the cutter in the cutter-head and arranging it so that it can be readily removed for sharpening or for repairs.

Referring to the drawings, A A- represent the base or supporting bed of the machine. .A part of the base, A', circular, and is raised above `thepart A. Around the circular part A is tted, so as to move easily, a. gear-wheel, D. To the circular port-ion A of the base is attached a guide-t`rame, D, in such a manner that its direction may be changed across the base in order to admit of the file being presented to the cutter at different angles, a projection, o, on the underside securing it centrally on the base. In the guide-frame D is tted, so as to slide freely, the' file-blank holder E, in which the le-blankF is firmly set. At one end of the guide-frame D is a small gear-wheel or pinion, C, which meshes with the large gear-wheel B. The small gear is secured to one end of a. large set-screw, G, which passes within the guide-frame D andovorks within a female screw formed in a head in the tile-blank holder E, so that as the screw G is turned the ile-blank holder will be Vgradually moved in the required direction. Motion is imparted to the large gear-wheel as follows: At one side of the base or bed A is a slidingbar, H, moving in suitable guides. At a proper point above the portion ofthe gearwheel D which passes under the slide H, is a pawl` I, so arranged as to catch in the teeth of the wheel B and move it in one direction; and as the slidingbar His moved backwards the pawl I will move over the teeth until brought-fte a point for the next forward motion. The forward motion of the bar H is effected by means of a three-armed cani, k, whichl arms, in their rotation, strike against a shoulder orvraised portion, 7L, on the slide D. When the cam has passed over said shoulder or projection, the slide H is retracted by means ot' a spring attached to its rear end or by any other equivalent device. The projection It may be adjusted to vary the throw of the slide H, and thus regulate the distance between the cuts en the file-blank. Over the base or bed A A is placed a suitableframe, F, for carrying the cutter-head and/its attachments. M represents a block or head, having grooved sides. and ttcd to slide on guides in the end of the upper frame in a direction to bring the cutter at an angle with the iilebla'ik.V N is a block. secured in the upper part of the cutter-head, and is inadeadjustable in position so that it can be moved downwards and secured in position at any point as the cutter is worn away at'its edge and becomes shorter. Below the adjustable block N is arranged the cutter O, which is held in position by means of a spring-yoke, P, provided at its lower ends with projections that take Vinto corresponding notches in the upper part of the cutter on`each side. The upper part of the yoke bears against the adjustable block N, and moves with the same. By opening the jaws or sides of the yoke P the cutter O will be released and can readily be removed for sharpening. As the edge wears away the block N is moved downward, bringing down the yoke so that the edge of the cutter will always maintain a proper relation to the'iil-e-blank.' The cutter is arranged in the lower part of the head so as to have an independant motion at its lower part ina direction at right angles with its width. The lower part of the cutter is held against the front portion of'the cutter-head by ureans oi' a spring, or its equivalent, in which position it retained whenV the-cutter is not in Contact with thefile-blank; but when the cutter isl brought down upon the said bla/nii it:` angular position will cause it to throw out the .surface Veut in a manner similar to that effectedby hand-work. which cannotbe done by cutters that are rigidly fixed in the heads. The hammer or cutter-head is operated by means of a cam, L. strihingr against a block, l, and the length of' the stroke oi' the said cutter-head 'may be regulated by adjusting the block Zhigher or lower in the head. 'lhe downward blow of' the-cutter is 'effected by means of a spring, S, arranged in the upper part of the frame, and passing under a pin or cross-bar in thc centre, rests at its front end in a cross-piece, when the cutter-head has completed its downward stroke.y A similar spring, S', is arranged in like manner in the lower par/t of the frame for the purpose of' raising the cutter from the {ile-blank immediately after theY blow is struck. The power of each spring may be regulated by a screw, T, at the rear, or by changing the position et' the bearing-rods in front. Fig. 4 shows a modifica, tion of the device for adjusting the cutter, consist-ing ot' a screw which operates the adjustiirgblook N.

The operation is as follows: Motion being imparted to the shafts by any proper means, the cams lc impart a reciprocating motion to the sliding-bar H iu the manner above describedpwhich in turn causes the gear-wheel to rotate intermittently. The rotation of the said wheel turns the pinion (l, attached to the screw G, which latter causes the {ile-blank holder to more forward after each blow of the cutter upon the blank, the degree of motion being graduated by means of the adjustable projection z.' The main shaft at the same time carries the cam L, which raises the cutter-head, thc latter being brought down with force by means of the upper spring S, and retracted or raised from the {ile-blank by means of the lower sprin- S.

IIavinp,l thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. 'Ihe combination of the guide-frame I), the pinionC, and rotating;- rack-gear I, as described,

2. I claim the sliding-block or bar H, provided with the pawl z', the adjustable projection it, and retracting spring I, in combination with the rotating rack-gear B, substantially as and for the purpose specified.

3. I claim the combination of the yoke I, adjustable block N, or its equivalent, and the cutter O, operating as described, substantially as and for the purpose set forth.

4. I claim the combination of the springs S S arranged as described, with theentter-head M, as and for the purpose specified. l n

In testinionywhereofI have signed my name to this specification in the presence of twosubscribingwituesses.

ALEXR. N. RB DMAN.

Witnesses:

J. II. ADAMS, D.V KELLBHER. 

